Fix crashes in gui and core

Cargo.lock

@@ -341,9 +341,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "3.2.11"
+version = "3.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d646c7ade5eb07c4aa20e907a922750df0c448892513714fd3e4acbc7130829f"
+checksum = "ab8b79fe3946ceb4a0b1c080b4018992b8d27e9ff363644c1c9b6387c854614d"
 dependencies = [
  "atty",
  "bitflags",
@@ -2505,9 +2505,9 @@ dependencies = [
 
 [[package]]
 name = "spin"
-version = "0.9.3"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c530c2b0d0bf8b69304b39fe2001993e267461948b890cd037d8ad4293fa1a0d"
+checksum = "7f6002a767bff9e83f8eeecf883ecb8011875a21ae8da43bffb817a57e78cc09"
 dependencies = [
  "lock_api",
 ]

czkawka_cli/Cargo.toml

@@ -10,7 +10,7 @@ homepage = "https://github.com/qarmin/czkawka"
 repository = "https://github.com/qarmin/czkawka"
 
 [dependencies]
-clap = { version = "3.2.11", features = ["derive"] }
+clap = { version = "3.2.12", features = ["derive"] }
 
 # For enum types
 image_hasher = "1.0.0"

czkawka_core/src/similar_images.rs

@@ -732,7 +732,8 @@ impl SimilarImages {
             }
 
             let number_of_processors = num_cpus::get();
-            let chunks: Vec<_> = all_hashes.chunks(all_hashes.len() / number_of_processors).collect();
+            let chunk_size = all_hashes.len() / number_of_processors;
+            let chunks: Vec<_> = if chunk_size > 0 { all_hashes.chunks(chunk_size).collect() } else { vec![&all_hashes] };
 
             let parts: Vec<_> = chunks
                 .into_par_iter()

czkawka_gui/src/help_functions.rs

@@ -608,14 +608,23 @@ pub fn resize_pixbuf_dimension(pixbuf: Pixbuf, requested_size: (i32, i32), inter
 
 pub fn get_max_file_name(file_name: &str, max_length: usize) -> String {
     assert!(max_length > 10); // Maybe in future will be supported lower values
-    if file_name.len() > max_length {
-        let difference = file_name.len() - max_length;
+    let characters_in_filename = file_name.chars().count();
+    if characters_in_filename > max_length {
+        let start_characters = 10;
+        let difference = characters_in_filename - max_length;
+        let second_part_start = start_characters + difference;
+        let mut string_pre = "".to_string();
+        let mut string_after = "".to_string();
 
-        let mut string = "".to_string();
-        string += &file_name[0..10];
-        string += " ... ";
-        string += &file_name[10 + difference..];
-        string
+        for (index, character) in file_name.chars().enumerate() {
+            if index < start_characters {
+                string_pre.push(character);
+            } else if index >= second_part_start {
+                string_after.push(character);
+            }
+        }
+
+        format!("{string_pre} ... {string_after}")
     } else {
         file_name.to_string()
     }
@@ -714,3 +723,13 @@ pub fn get_pixbuf_from_dynamic_image(dynamic_image: &DynamicImage) -> Result<Pix
     }
     Pixbuf::from_read(arra)
 }
+
+#[test]
+fn test_file_name_shortener() {
+    let name_to_check = "/home/rafal/czkawek/romek/atomek.txt";
+    assert_eq!(get_max_file_name(name_to_check, 20), "/home/rafa ... atomek.txt".to_string());
+    assert_eq!(get_max_file_name(name_to_check, 21), "/home/rafa ... /atomek.txt".to_string());
+    let name_to_check = "/home/rafal/czkawek/romek/czekistan/atomek.txt";
+    assert_eq!(get_max_file_name(name_to_check, 21), "/home/rafa ... /atomek.txt".to_string());
+    assert_eq!(get_max_file_name(name_to_check, 80), name_to_check.to_string());
+}